KR20070041374A - 불휘발성 반도체 기억 장치 - Google Patents
불휘발성 반도체 기억 장치 Download PDFInfo
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- KR20070041374A KR20070041374A KR1020060099635A KR20060099635A KR20070041374A KR 20070041374 A KR20070041374 A KR 20070041374A KR 1020060099635 A KR1020060099635 A KR 1020060099635A KR 20060099635 A KR20060099635 A KR 20060099635A KR 20070041374 A KR20070041374 A KR 20070041374A
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Abstract
Description
Claims (21)
- 반도체 기판 내에 배치되는 소스·드레인 확산층과,상기 소스·드레인 확산층 사이의 채널 상에 배치되는 제1 절연막과,상기 제1 절연막 상에 배치되고, 스택된 복수의 제1 도전층으로 구성되는 플로팅 게이트 전극과,상기 플로팅 게이트 전극 상에 배치되는 제2 절연막과,상기 제2 절연막 상에 배치되는 컨트롤 게이트 전극을 구비하고,상기 복수의 제1 도전층 중 최상층을 제외한 1개의 제1 도전층을 기준층으로 한 경우에, 상기 기준층의 일함수는, 4.0eV 이상이고, 상기 기준층으로부터 위의 기준층을 포함하는 복수의 제1 도전층의 일함수는, 상기 제2 절연막을 향함에 따라서 점차 커지는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항에 있어서,상기 기준층은, 불순물을 포함하는 도전성 반도체 재료로 구성되고, 상기 기준층보다 위의 적어도 1개의 제1 도전층은, 금속으로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제2항에 있어서,상기 불순물은, n형 불순물이고, 상기 도전성 반도체 재료는, 폴리실리콘이 며, 상기 n형 불순물의 불순물 농도는, 5×1O19㎝-3 이상인 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항에 있어서,상기 기준층 및 그것보다 위의 적어도 1개의 제1 도전층은, 금속으로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 복수의 제1 도전층의 최하층은, 불순물을 포함하는 도전성 반도체 재료로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 기준층 및 그것보다 위의 적어도 1개의 제1 도전층의 일함수는, 4.0eV 내지 5.2eV까지의 범위 내에 포함되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제6항에 있어서,상기 기준층보다 위의 적어도 1개의 제1 도전층의 일함수는, 4.4eV 이상인 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 컨트롤 게이트 전극은, 상기 기준층의 일함수보다 큰 일함수를 갖는 도전 재료로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 컨트롤 게이트 전극은, 상기 복수의 제1 도전층의 최상층과 동일한 재료로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 컨트롤 게이트 전극은, 스택된 복수의 제2 도전층으로 구성되고, 상기 복수의 제2 도전층의 최하층은, 상기 기준층의 일함수보다 큰 일함수를 갖는 도전 재료로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제10항에 있어서,상기 복수의 제2 도전층의 일함수는, 상기 제2 절연막을 향함에 따라서 점차 커지는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제10항에 있어서,상기 복수의 제2 도전층의 저항율은, 상기 제2 절연막으로부터 멀어짐에 따 라서 점차 작아지는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제10항에 있어서,상기 복수의 제2 도전층의 최하층은, 상기 복수의 제1 도전층의 최상층과 동일한 재료로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 플로팅 게이트 전극의 두께, 길이 및 폭을, 각각, TFG, L 및 W로 한 경우에, TFG<L, 또한, TFG<W인 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 복수의 제1 도전층의 최하층은, 상기 복수의 제1 도전층 중에서 가장 두꺼운 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 복수의 제1 도전층의 최하층은, Si, Ta, Hf, Zr, Al, Ti 중에서 선택되는 1종류 이상의 원소를 포함하는 재료, 또는, 그 재료의 질화물, 탄화물, 규화물, 규질화물 혹은 규탄질화물로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제16항에 있어서,상기 복수의 제1 도전층의 최하층이 규화물인 경우에, 상기 규화물의 조성은, Si의 원자수가 금속 원자의 원자수 이상인 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 복수의 제1 도전층의 최상층은, Pt, W, Ir, Ru, Re, Mo, Ti, Ta, Ni, Co 중에서 선택되는 1종류 이상의 원소를 포함하는 재료, Pt, W, Ti, Ta, Ni, Co 중에서 선택되는 1종류 이상의 원소를 포함하는 재료의 규화물, W, Ti, Ta 중에서 선택되는 1종류 이상의 원소를 포함하는 재료의 탄화물, W, Mo, Ti, Ta 중에서 선택되는 1종류 이상의 원소를 포함하는 재료의 질화물, Ti를 포함하는 재료의 규질화물, Ir, Ru 중에서 선택되는 1종류 이상의 원소를 포함하는 재료의 산화물, 또는, 그들의 화합물 혹은 혼합물로 구성되는 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제18항에 있어서,상기 복수의 제1 도전층의 최상층이 규화물인 경우에, 상기 규화물의 조성은, 금속 원자의 원자수가 Si의 원자수 이상인 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 제2 절연막은, Al, Hf, La, Y, Ce, Ti, Zr, Si 중에서 선택되는 적어도 1개의 원소를 포함하는 재료의 산화물, 질화물, 또는, 산질화물인 것을 특징으로 하는 불휘발성 반도체 기억 장치.
- 제1항 내지 제4항 중 어느 한 항에 있어서,,상기 제2 절연막은, 3개 이상의 층으로 구성되고, 상기 3개 이상의 층 중 상기 플로팅 게이트 전극 및 상기 컨트롤 게이트 전극의 쌍방에 접촉하지 않는 층은, Al, Hf, La, Y, Ce, Ti, Zr, Si 중에서 선택되는 적어도 1개의 원소를 포함하는 재료의 산화물, 질화물, 또는, 산질화물인 것을 특징으로 하는 불휘발성 반도체 기억 장치.
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US6630383B1 (en) * | 2002-09-23 | 2003-10-07 | Advanced Micro Devices, Inc. | Bi-layer floating gate for improved work function between floating gate and a high-K dielectric layer |
JP2004214408A (ja) * | 2002-12-27 | 2004-07-29 | Nec Electronics Corp | 電圧制御可変容量素子 |
JP2005026589A (ja) * | 2003-07-04 | 2005-01-27 | Toshiba Corp | 半導体記憶装置及びその製造方法 |
JP2005311300A (ja) | 2004-03-26 | 2005-11-04 | Toshiba Corp | 半導体記憶装置及びその製造方法 |
US8399934B2 (en) * | 2004-12-20 | 2013-03-19 | Infineon Technologies Ag | Transistor device |
US7138680B2 (en) | 2004-09-14 | 2006-11-21 | Infineon Technologies Ag | Memory device with floating gate stack |
US7692973B2 (en) * | 2006-03-31 | 2010-04-06 | Semiconductor Energy Laboratory Co., Ltd | Semiconductor device |
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2006
- 2006-09-28 JP JP2006265905A patent/JP4928890B2/ja not_active Expired - Fee Related
- 2006-10-12 US US11/548,914 patent/US7560767B2/en not_active Expired - Fee Related
- 2006-10-13 KR KR1020060099635A patent/KR100858758B1/ko active IP Right Grant
- 2006-10-13 TW TW095137734A patent/TW200731536A/zh not_active IP Right Cessation
Cited By (7)
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KR100897825B1 (ko) * | 2007-08-31 | 2009-05-15 | 주식회사 동부하이텍 | 비휘발성 메모리 및 그 제조방법 |
US8270216B2 (en) | 2008-04-01 | 2012-09-18 | Kabushiki Kaisha Toshiba | Semiconductor storage device and method of manufacturing the same |
US8476692B2 (en) | 2010-03-04 | 2013-07-02 | Samsung Electronics Co., Ltd. | Semiconductor devices and methods of manufacturing the same |
US9129950B2 (en) | 2010-03-04 | 2015-09-08 | Samsung Electronics Co., Ltd. | Semiconductor devices |
US9443863B2 (en) | 2010-03-04 | 2016-09-13 | Samsung Electronics Co., Ltd. | Semiconductor devices |
KR20140052984A (ko) * | 2011-03-22 | 2014-05-07 | 샌디스크 테크놀로지스, 인코포레이티드 | P-/금속 플로팅 게이트 비휘발성 저장요소 |
US10141322B2 (en) | 2013-12-17 | 2018-11-27 | Intel Corporation | Metal floating gate composite 3D NAND memory devices and associated methods |
Also Published As
Publication number | Publication date |
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JP4928890B2 (ja) | 2012-05-09 |
JP2007134681A (ja) | 2007-05-31 |
US20070132004A1 (en) | 2007-06-14 |
US7560767B2 (en) | 2009-07-14 |
TWI321851B (ko) | 2010-03-11 |
TW200731536A (en) | 2007-08-16 |
KR100858758B1 (ko) | 2008-09-16 |
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